Date: Wed, 13 Jun 2001 11:55:29 +1000 From: Kal Torak <kaltorak@quake.com.au> To: Rowan Crowe <rowan@sensation.net.au> Cc: freebsd-isp@freebsd.org Subject: Re: keeping identical copy of second drive Message-ID: <3B26C811.26CC58B0@quake.com.au> References: <Pine.BSF.4.21.0106130814390.14815-100000@velvet.sensation.net.au>
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Rowan Crowe wrote: > > Hello, > > I am just about to take delivery of a new 1RU machine which has identical > 20Gb drives, one of them in a removable caddy. Ideally I want the second > HD to be a mirror image of the first, either in real time or periodically > transferred over. dump should do this just fine... It seems you just want a drive that will boot, no really true redundancy that RAID offers... > I've had a look at vinum but that seems to be out, as I need to be able to > boot from the backup HD immediately - the 2 HD arrangement is mainly to > minimise downtime in the event of a mechanical HD failure. BTW, can > FreeBSD boot successfully from the second HD if I disable the first in the > BIOS and boot -c? I'm not yet familiar with how 4.x works, are the ata > drives allocated dynamically or can you specify "probe this drive, and > ignore this drive"? I think Greg is working on making vinum drives bootable, but I seem to remember he said it would only work in 5-current because of the devfs or something it has?!? How I understand it, is vinum can load up fine before any disk access needs to be done, but the /dev file system isnt mounted so it cant get its configuration data... Anyway in regard to the ata drives, this is a kernel option, you can choose static drive mappings or let them be dynamically allocated... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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